CN109778986A - A kind of prestressed concrete pipe road preventing differential settlement and its construction method - Google Patents
A kind of prestressed concrete pipe road preventing differential settlement and its construction method Download PDFInfo
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- CN109778986A CN109778986A CN201711127519.6A CN201711127519A CN109778986A CN 109778986 A CN109778986 A CN 109778986A CN 201711127519 A CN201711127519 A CN 201711127519A CN 109778986 A CN109778986 A CN 109778986A
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Abstract
The invention discloses a kind of prestressed concrete pipe road for preventing differential settlement, including pipeline and pipeline foundation, the pipe diameter is DN500mm-600mm, and the pipeline uses armored concrete prestressed pipe.This prevents the prestressed concrete pipe road and its construction method of differential settlement, easy construction, convenient for operation, when not influencing pipeline construction progress, it ensure that prestressed reinforced concrete interface quality, 5m prestressed concrete pipe is set to play a greater role in collapsible loess, and prestressed reinforced concrete pipe compression strength is high, guarantee interface construction quality, such as the micro differential settlement of soil matrix, nor affect on the normal use of pipeline, the detail construction technique at drainage pipeline joint in collapsible loess, it ensure that because depression pressure pipeline is damaged collapsible loess due to meeting water, avoid later period Pipeline damage, the reduction of maintenance cost, and there is good technology and society promotional value, it offers reference meaning for some reference.
Description
[technical field]
The present invention relates to technical field of buildings, in particular to a kind of prestressed concrete pipe road for preventing differential settlement and
Its construction method.
[background technique]
Collapsible loess is wider in China central and west regions branch, it meets water depression, when general pipeline is laid herein, such as
Dealing with improperly can often make pipeline generate differential settlement, or generate hanging phenomenon under water erosion effect, to change pipeline
Stress.And prestressed concrete pipe road can overcome the problems, such as compared with general pipeline more than and defect, and
The application of the Collapsible Loess Districts such as river regulation is few, also has no that there is relevant similar report in the country.To guarantee its construction quality
And construction period, compare by kinds of processes and demonstration, research and development summarize such pipeline and construction method, prestressing force repeatedly
Concrete duct is able to bear biggish pipe external load, with electrochemical corrosion resistant performance, compensate for cannot bear to be self-possessed it is wet
The defect for falling into property loess pressure and basement process, for this purpose, it is proposed that a kind of prestressed concrete pipe for preventing differential settlement
Road and its construction method.
[summary of the invention]
The main purpose of the present invention is to provide a kind of prestressed concrete pipe road for preventing differential settlement and its constructions
Method can solve problem above.
To achieve the above object, the technical scheme adopted by the invention is as follows:
A kind of prestressed concrete pipe road preventing differential settlement, including pipeline and pipeline foundation, the pipe diameter
For DN500mm-600mm, the pipeline uses armored concrete prestressed pipe.
Prevent the construction method in the prestressed concrete pipe road of differential settlement, comprising the following steps:
Step 1: first carrying out slope processing to foundation pit, and is 1:0.5 progress channel excavation according to sloping coefficient, and there are
Enough width make trough rim two sides after channel excavation respectively have the platform of 1m.
Step 2: collapsible loess area prestressed concrete pipe bed course is successively arranged 37 lime earth pad and element soil from top to bottom
Bed course after check of foundation subsoil is qualified in step 1, carries out plain soil padding backfill first, with a thickness of 30cm, and is equipped with three on plain soil padding
Seven dirt pads are layered place mat and tamp, compactness coefficient is not less than 0.95 with a thickness of 15cm.
Step 3: flattening to bed course and tamp, then pours the flat base portion point on 180 ° of concrete duct bases, pre- at pipe joint
Bury 6 φ, 14 reinforcing bar and out flat base portion point concrete mats level 240mm.
Step 4: after concrete cushion concrete strength reaches down tube construction intensity, survey crew releases pipeline middle line,
And pipe crust sideline releases, and prestressed concrete pipe is utilized suspender belt, prestressed concrete pipe is put into corresponding in channel steel
Position, pipeline is sequenced, then line is corrected, middle line and absolute altitude is controlled and is being answered in advance using center collimation method and sideline method centering
It under power pipe of concrete when ditch, is laid with using countercurrent direction, it is identical that bellmouth direction and medium flow field come direction, and bellmouth direction and pipeline
It is identical to be laid with direction, circumferential binding wirerope, is provided with lateral girder steel in pipe of concrete female end on prestressed concrete pipe,
By lumps of wood pad between the transverse direction girder steel and pipe of concrete, there are two same specifications for suspension between the wirerope and girder steel
Pull jack, tensing jack makes nozzle to just, synchronous to pull jack, and the socket end for having packaged rubber ring is entered bellmouth
Working face is in place, while correcting the straightness of tube bottom and the scrolling position of rubber ring at any time.
Step 5: when prestressed concrete pipe after the installation is completed, and adjust it is fixed after carry out the binding of inner and outer ring muscle, with step
Two concrete cushion embedded bar is fixed, while being fixed by waterstop and polyethylene foam plate, then carries out the in interface
Second coagulation soil pours, and pours to prestressed concrete pipe crust, then carry out the encapsulating of 5m homogeneous tube and pour.
Step 6: after maintenance 3-4d reaches some strength, then carrying out closed-water test, fills the water to the inspection shaft for closing water section,
Observe pipeline water percolating capacity, until observation at the end of, should the constantly moisturizing into test section, keep test head it is constant.
Step 7: back-filling in layers compacting is carried out, every layer of compacted thickness is not more than 20cm, and returns in thoracic cavity two sides using symmetrical
It fills out.
Further, the cutting depth bosom of foundation pit is greater than 8m in step 1, and sewage conduct channel excavation depth is small
When 5m, and when this engineering channel excavation depth is not less than 5m, position of the earthwork to slot bottom less than 5m need to will drop.
Further, grass roots and brick must not be contained in plain soil padding in step 2.
Further, concrete cushion uses C20 concrete in step 3, and pours thickness according to prestressed concrete
Bore determines, pours layer surface and hair side is made and rinses well.
It further, will be inside bellmouth, outside socket and rubber ring is clear in step 4 before prestressed concrete pipe interface
Clean down, and on rubber ring after coating lubricating oil by rubber ring sleeve in socket end, and rubber ring keeps straight and even, and when installation returns
Bullet is not greater than 10mm.
Further, it is closed in step 6 before water experiment water filling, should check pipe plug, pipeline, well bore, reach no leak and want
After asking, then pipeline and well are impregnated, soaking time is greater than 24 hours after prestressed concrete pipe fills water before testing.
Further, in step 7 backfill since tube bottom within the scope of the above 70cm of tube top, using artificial backfill, often
Layer compacted thickness is not more than 15cm, is backfilled when being backfilled to the above Shi Keyong bull-dozer cooperation road roller of tube top 1m, compacting is thick
Degree is no more than 30cm.
Compared with prior art, the invention has the following beneficial effects: the prestressed concretes that this prevents differential settlement
Pipeline and its construction method, easy construction are convenient for operation, when not influencing pipeline construction progress, ensure that prestress steel
Reinforced concrete interface quality, makes 5m prestressed concrete pipe play a greater role in collapsible loess, and deformed bar is mixed
Solidifying soil pipe compression strength is high, guarantees that interface construction quality nor affects on the normal of pipeline such as the micro differential settlement of soil matrix
It uses, the detail construction technique at drainage pipeline joint in collapsible loess ensure that because collapsible loess sinks because meeting water
Sunken pressure pipeline is damaged, and avoids later period Pipeline damage, the reduction of maintenance cost, and have good technology and society promotion price
Value is offered reference meaning for some reference.
[Detailed description of the invention]
Fig. 1 is prestressed concrete pipe interface longitudinal plane structure schematic diagram of the present invention；
Fig. 2 is prestressed concrete pipe interface cross-sectional configuration schematic diagram of the present invention；
Fig. 3 is prestressed concrete pipe mounting structure schematic diagram of the present invention.
In figure: 1, concrete cushion；2,37 lime earth pad pad；3, plain soil padding；4, prestressed concrete；5, ring muscle；6,
Jack；7, wirerope；8, channel steel；9, rubber ring；10, the lumps of wood.
[specific embodiment]
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment, the present invention is further explained.
As shown in Figure 1-3, a kind of prestressed concrete pipe road for preventing differential settlement, including pipeline and pipeline foundation,
The pipe diameter is DN500mm-600mm, and the pipeline uses armored concrete prestressed pipe.
Prevent the construction method in the prestressed concrete pipe road of differential settlement, comprising the following steps:
Step 1: first carrying out slope processing to foundation pit, and is 1:0.5 progress channel excavation according to sloping coefficient, and there are
Enough width make trough rim two sides after channel excavation respectively have the platform of 1m.
Step 2: prestressed concrete pipe 4 bed course in collapsible loess area is successively arranged 37 lime earth pad 2 and element from top to bottom
Soil padding 3 after check of foundation subsoil is qualified in step 1, carries out plain soil padding 3 first and backfills, and with a thickness of 30cm, and is laid on plain soil padding 3
There is 37 lime earth pad 2, with a thickness of 15cm, is layered place mat and tamps, compactness coefficient is not less than 0.95.
Step 3: flattening to bed course and tamp, then pours the flat base portion point on 180 ° of concrete duct bases, pre- at pipe joint
It buries 6 φ, 14 reinforcing bar and flat base portion divides concrete cushion 1 face 240mm out.
Step 4: after 1 concrete strength of concrete cushion reaches down tube construction intensity, survey crew puts pipeline middle line
Out and pipe crust sideline releases, and prestressed concrete pipe 4 is utilized suspender belt, prestressed concrete pipe 4 is put into channel steel 8
Corresponding position, pipeline is sequenced, and is then corrected to line, and middle line and absolute altitude are controlled, using center collimation method and sideline method centering,
It under prestressed concrete pipe 4 when ditch, is laid with using countercurrent direction, it is identical that bellmouth direction and medium flow field come direction, and bellmouth side
To, on prestressed concrete pipe 4 circumferential binding wirerope 7, in pipe of concrete female end erection identical as pipeline paving set direction
There is lateral girder steel to hang between the wirerope 7 and girder steel by 10 pad of the lumps of wood between the transverse direction girder steel and pipe of concrete
Jack 6 is pulled there are two same specification, tensing jack 6 makes nozzle to just, and synchronous pulling jack 6 will package rubber ring 9
Socket end enters that bellmouth working face is in place, while correcting the straightness of tube bottom and the scrolling position of rubber ring 9 at any time.
Step 5: when prestressed concrete pipe 4 after the installation is completed, and adjust it is fixed after carry out inner and outer ring muscle 5 and bind, with step
Rapid two 1 embedded bar of concrete cushion is fixed, while being fixed by waterstop and polyethylene foam plate, then is carried out in interface
Second of concreting pours to prestressed concrete pipe crust, then carries out the encapsulating of 5m homogeneous tube and pour.
Step 6: after maintenance 3-4d reaches some strength, then carrying out closed-water test, fills the water to the inspection shaft for closing water section,
Observe pipeline water percolating capacity, until observation at the end of, should the constantly moisturizing into test section, keep test head it is constant.
Step 7: back-filling in layers compacting is carried out, every layer of compacted thickness is not more than 20cm, and returns in thoracic cavity two sides using symmetrical
It fills out.
Wherein, the cutting depth bosom of foundation pit is greater than 8m in step 1, and sewage conduct channel excavation depth is less than 5m
When, and when this engineering channel excavation depth is not less than 5m, position of the earthwork to slot bottom less than 5m need to will drop.
Wherein, grass roots and brick must not be contained in plain soil padding 3 in step 2.
Wherein, concrete cushion 1 uses C20 concrete in step 3, and pours thickness according to prestressed concrete pipe 4
Internal diameter determines, pours layer surface and hair side is made and rinses well.
It wherein, will be inside bellmouth, outside socket and rubber ring 9 is cleaned with water in step 4 before 4 interface of prestressed concrete pipe
Completely, and on rubber ring 9 after coating lubricating oil by 9 sets of rubber ring in socket end, and rubber ring 9 keeps straight and even, when installation
Rebound is not greater than 10mm.
Wherein, it is closed in step 6 before water experiment water filling, should check pipe plug, pipeline, well bore, reach no leak requirement
Afterwards, then pipeline and well are impregnated, soaking time is greater than 24 hours after prestressed concrete pipe 4 fills water before testing.
Wherein, in step 7 backfill since tube bottom within the scope of the above 70cm of tube top, using artificial backfill, every lamination
Real thickness is not more than 15cm, is backfilled when being backfilled to the above Shi Keyong bull-dozer cooperation road roller of tube top 1m, compacted thickness is not
More than 30cm.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (8)
1. a kind of prestressed concrete pipe road for preventing differential settlement, including pipeline and pipeline foundation, it is characterised in that: described
Pipe diameter is DN500mm-600mm, and the pipeline uses armored concrete prestressed pipe.
2. the construction method in the prestressed concrete pipe road according to claim 1 for preventing differential settlement, feature exist
In: the following steps are included:
Step 1: first carrying out slope processing to foundation pit, and is that 1:0.5 carries out channel excavation, and there are enough according to sloping coefficient
Width make trough rim two sides after channel excavation respectively have the platform of 1m.
Step 2: collapsible loess area prestressed concrete pipe (4) bed course is successively arranged 37 lime earth pad (2) and element from top to bottom
Soil padding (3) after check of foundation subsoil is qualified in step 1, carries out plain soil padding (3) first and backfills, with a thickness of 30cm, and plain soil padding (3)
On be equipped with 37 lime earth pad (2), with a thickness of 15cm, be layered place mat and simultaneously tamp, compactness coefficient is not less than 0.95.
Step 3: flattening to bed course and tamp, then pours the flat base portion point on 180 ° of concrete duct bases, pre-buried 6 at pipe joint
14 reinforcing bar of φ and out flat base portion divide concrete cushion (1) face 240mm.
Step 4: after concrete cushion (1) concrete strength reaches down tube construction intensity, survey crew releases pipeline middle line,
And pipe crust sideline releases, and prestressed concrete pipe (4) are utilized suspender belt, prestressed concrete pipe (4) is put into channel steel (8)
In corresponding position, pipeline is sequenced, then line is corrected, middle line and absolute altitude are controlled, using center collimation method and sideline method pair
In, it under prestressed concrete pipe (4) when ditch, is laid with using countercurrent direction, it is identical that direction with medium flow field is come in bellmouth direction, and holds
Mouth direction is identical as pipeline paving set direction, and circumferential binding wirerope (7), holds in pipe of concrete on prestressed concrete pipe (4)
Mouthful end-rack is equipped with lateral girder steel, by the lumps of wood (10) pad between the transverse direction girder steel and pipe of concrete, the wirerope (7) with
Pulling jack (6) there are two same specification is hung between girder steel, tensing jack (6) makes nozzle to just, synchronizes and pulls jack
(6), the socket end for having packaged rubber ring (9) enters to bellmouth working face is in place, while correcting the straight of tube bottom at any time
The scrolling position of dimension and rubber ring (9).
Step 5: when prestressed concrete pipe (4) after the installation is completed, and adjust it is fixed after carry out inner and outer ring muscle (5) binding, with step
Rapid two concrete cushion (1) embedded bar is fixed, while being fixed by waterstop and polyethylene foam plate, then interface into
Second of concreting of row pours to prestressed concrete pipe crust, then carries out the encapsulating of 5m homogeneous tube and pour.
Step 6: after maintenance 3-4d reaches some strength, then carrying out closed-water test, fills the water to the inspection shaft for closing water section, observation
The water percolating capacity of pipeline, until observation at the end of, should the constantly moisturizing into test section, keep test head it is constant.
Step 7: carrying out back-filling in layers compacting, and every layer of compacted thickness is not more than 20cm, and in thoracic cavity two sides using symmetrical backfill.
3. the prestressed concrete pipe road according to claim 2 for preventing differential settlement and its construction method, feature
Be: the cutting depth bosom of foundation pit is greater than 8m in step 1, when sewage conduct channel excavation depth is less than 5m, and when this
When engineering channel excavation depth is not less than 5m, position of the earthwork to slot bottom less than 5m need to will drop.
4. the prestressed concrete pipe road according to claim 2 for preventing differential settlement and its construction method, feature
It is: grass roots and brick must not be contained in plain soil padding (3) in step 2.
5. the prestressed concrete pipe road according to claim 2 for preventing differential settlement and its construction method, feature
Be: concrete cushion (1) uses C20 concrete in step 3, and pours thickness according to prestressed concrete pipe (4) internal diameter
It determines, pours layer surface and hair side is made and rinses well.
6. the prestressed concrete pipe road according to claim 2 for preventing differential settlement and its construction method, feature
Be: in step 4 before prestressed concrete pipe (4) interface, by inside bellmouth, outside socket and rubber ring (9) clean with water it is dry
Only, and on rubber ring (9) rubber ring (9) is covered in socket end after coating lubricating oil, and rubber ring (9) keeps straight and even, peace
Rebound is not greater than 10mm when dress.
7. the prestressed concrete pipe road according to claim 2 for preventing differential settlement and its construction method, feature
It is: is closed in step 6 before water experiment water filling, should check pipe plug, pipeline, well bore, after reaching no leak requirement, then impregnate
Pipeline and well, soaking time is greater than 24 hours after prestressed concrete pipe (4) fills water before testing.
8. the prestressed concrete pipe road according to claim 2 for preventing differential settlement and its construction method, feature
Be: backfill is within the scope of the above 70cm of tube top since tube bottom in step 7, and using artificial backfill, every layer of compacted thickness is not
Greater than 15cm, backfilled when being backfilled to the above Shi Keyong bull-dozer cooperation road roller of tube top 1m, compacted thickness is no more than 30cm.
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| CN201711127519.6A CN109778986A (en) | 2017-11-15 | 2017-11-15 | A kind of prestressed concrete pipe road preventing differential settlement and its construction method |
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| CN201711127519.6A CN109778986A (en) | 2017-11-15 | 2017-11-15 | A kind of prestressed concrete pipe road preventing differential settlement and its construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110904759A (en) * | 2019-10-21 | 2020-03-24 | 广东省交通规划设计研究院股份有限公司 | Method for determining thickness of filling layer of pipeline system in roadbed and processing structure |
| CN111305355A (en) * | 2020-04-10 | 2020-06-19 | 中交第三航务工程局有限公司南京分公司 | Seepage-proofing process for ultra-large-diameter concrete rainwater pipeline joint |
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| CN110904759A (en) * | 2019-10-21 | 2020-03-24 | 广东省交通规划设计研究院股份有限公司 | Method for determining thickness of filling layer of pipeline system in roadbed and processing structure |
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| CN111305355A (en) * | 2020-04-10 | 2020-06-19 | 中交第三航务工程局有限公司南京分公司 | Seepage-proofing process for ultra-large-diameter concrete rainwater pipeline joint |
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Application publication date: 20190521 |